.swiper-container {width: 100%;height: 18rem;} 
.swiper-container img {width: 100%;height: 100%;}
.swiper-pagination-bullet {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 8px;
    background: #555;
    opacity: 0.8;
    border: 1px solid #fff;
}

.swiper-pagination-bullet-active {background: #fff;}